That's certainly the kind of solution I am looking for. Unfortunately it doesn't quite do what I want, probably my fault for not taking a real file home with me.
I am back in work this morning and have just tried it against a real sample file -
So where I have single quoted strings inside brackets, I'm not losing the brackets.
This might be me, I had to change the outer quotes on your sed to " in order to get it to run -
Code:
sed ":start
/\[[^]]*\'\]/ {
s/\(\[[^]]*\)\'/\1/
b start
}
s/\[\([^]]*\)\]/\1/g" $File
Would you be kind enough to explain how the sed works? I am trying to get to grips with sed and would appreciate the insight.
Thanks for the help
The perl will get me out of trouble for now, but I'm not sure it is installed on all of our servers so would prefer a sed solution if possible for portability.
Hello. I am trying to convert occurrences of 'NULL' from a datafile. The 'NULL' occurences appears at this:
|NULL| NULL|NULL| NULL|NULL| NULL|NULL| NULL|
There should be 52 fields per line.
I would like any occurrence of | NULL| or |NULL| to appear as '||'
Currently I am using this sed... (2 Replies)
Hi Gurus,
I have a small requirement.
Let suppose i have a file test.txt
test.txt contains
Dispatched date = '2008-04-08'
Name = 'Logers'
Now i want to add one more line to it as Number of Responses = "$a"
$a will be chnaging dynamically which i had grepped it in the script.
Now i... (6 Replies)
Hi All,
I am facing a small problem in sed. I want to insert a line in the existing file.
Existing code:
access to attr=userPassword
by self write
by * auth
access to *
by self write
by users read
by anonymous auth
Desired code:
access to attr=userPassword
by self... (14 Replies)
Hi All,
I need to pick up data on both sides of "=" sign.
For eg, following is the context that I have.
125.156.125.147=machine1
147.125.185.156=machine2
147.125.185.159=machine3
Can I have the ip address in one variable and machine name in another variable using sed or awk.
... (1 Reply)
Hi
I have a file, with format like:
column1|coulumn2|column3|column4
A|X|K|18
L|O|R|31,42,25
G|H|I|55,66
L|E|Q|25,31,94
output required:
column1|coulumn2|column3|column4
A|X|K|18
L|O|R|31,25
L|E|Q|25,31
Input File Format: All columns are seperated using |, last column... (8 Replies)
Hello everyone,
unfortunately I am no unix nor scripting guru, which is why I am asking for help here. I am trying to reformat a .csv file using sed or awk which has the following format:
a,b,C-D-E,f,g
h,i,J,k,l
m,n,O-P-Q-R-S,t,u
v,w,X-Y,z,a
It's basically a 5-field text file which has an... (7 Replies)
This post is in reference to https://www.unix.com/shell-programming-scripting/137977-tricky-sed-awk-question-post302428154.html#post302428154
I am trying to go the opposite direction now:
I have the following file:
a,b,C,f,g
a,b,D,f,g
a,b,E,f,g
h,i,J,k,l
m,n,O,t,u
m,n,P,t,u
m,n,Q,t,u... (3 Replies)
Hi,
I have a file which contains two strings: AAAAA and BBBBB
I have two variables in my script:
DATE="03/21/2010"
aDate="20100321"
I need to replace string AAAAA with variable $DATE and BBBBB with $aDate. Here is what I do
sed "s/AAAAA/$DATE/" $BASIC_TMPLT | sed "s/BBBBB/$aDate/" >... (4 Replies)
Hi All,
I have one file with below type of data in it,
$ cat test.txt
###123
###xyxytuerwb
###2
###tyupe
Here I would like to replace all the characters with "x" after the 3 "###" with the same number of characters.
Can you please help me to achieve this. (7 Replies)
Hi
Can some one tell what does this sed command do
sed 's/*$//g
I am more curious on the highlighted part , can some one explain what does that mean.
Thanks
Sri (1 Reply)
Discussion started by: Sri3001
1 Replies
LEARN ABOUT REDHAT
tcl_getstdchannel
Tcl_GetStdChannel(3) Tcl Library Procedures Tcl_GetStdChannel(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_GetStdChannel, Tcl_SetStdChannel - procedures for retrieving and replacing the standard channels
SYNOPSIS
#include <tcl.h>
Tcl_Channel
Tcl_GetStdChannel(type)
Tcl_SetStdChannel(channel, type)
ARGUMENTS
int type (in) The identifier for the standard channel to retrieve or modify. Must be one of TCL_STDIN, TCL_STDOUT, or
TCL_STDERR.
Tcl_Channel channel (in) The channel to use as the new value for the specified standard channel.
_________________________________________________________________DESCRIPTION
Tcl defines three special channels that are used by various I/O related commands if no other channels are specified. The standard input
channel has a channel name of stdin and is used by read and gets. The standard output channel is named stdout and is used by puts. The
standard error channel is named stderr and is used for reporting errors. In addition, the standard channels are inherited by any child
processes created using exec or open in the absence of any other redirections.
The standard channels are actually aliases for other normal channels. The current channel associated with a standard channel can be
retrieved by calling Tcl_GetStdChannel with one of TCL_STDIN, TCL_STDOUT, or TCL_STDERR as the type. The return value will be a valid
channel, or NULL.
A new channel can be set for the standard channel specified by type by calling Tcl_SetStdChannel with a new channel or NULL in the channel
argument. If the specified channel is closed by a later call to Tcl_Close, then the corresponding standard channel will automatically be
set to NULL.
If a non-NULL value for channel is passed to Tcl_SetStdChannel, then that same value should be passed to Tcl_RegisterChannel, like so:
Tcl_RegisterChannel(NULL, channel);
This is a workaround for a misfeature in Tcl_SetStdChannel that it fails to do some reference counting housekeeping. This misfeature can-
not be corrected without contradicting the assumptions of some existing code that calls Tcl_SetStdChannel.
If Tcl_GetStdChannel is called before Tcl_SetStdChannel, Tcl will construct a new channel to wrap the appropriate platform-specific stan-
dard file handle. If Tcl_SetStdChannel is called before Tcl_GetStdChannel, then the default channel will not be created.
If one of the standard channels is set to NULL, either by calling Tcl_SetStdChannel with a NULL channel argument, or by calling Tcl_Close
on the channel, then the next call to Tcl_CreateChannel will automatically set the standard channel with the newly created channel. If
more than one standard channel is NULL, then the standard channels will be assigned starting with standard input, followed by standard out-
put, with standard error being last.
See Tcl_StandardChannels for a general treatise about standard channels and the behaviour of the Tcl library with regard to them.
SEE ALSO Tcl_Close(3), Tcl_CreateChannel(3), Tcl_Main(3), tclsh(1)KEYWORDS
standard channel, standard input, standard output, standard error
Tcl 7.5 Tcl_GetStdChannel(3)
05-22-2013
